Hey that looks really promising. Looks like you are going with the oils?

I have the feeling that TB just works in pixels so you have to do the maths yourself if you want to calculate how big a canvas you will in pixels need to support print resolutions given the physical size you want to print at.

I'm finding the whole masking process a bit frustrating in TB (photoshop it is not!). It doesn't seem to support a default transparent layer (but I'm probably doing something wrong) - right now I have the background set to white on all my layers and the blend mode as multiply (which isn't ideal). I'm almost inclined to forget that it has layers at all and just paint everything on one layer.